Filtration system



FIG. 1 is a bottom perspective view of a filtration system;

FIG. 2 is a front view of the filtration system;

FIG. 3 is a rear view of the filtration system;

FIG. 4 is a right side view of the filtration system;

FIG. 5 is a left side view of the filtration system;

FIG. 6 is a top view of the filtration system;

FIG. 7 is a bottom view of the filtration system;

FIG. 8 is a cross-sectional view of the filtration system through line 8-8 in FIG. 6; and,

FIG. 9 is a cross-sectional view of the filtration system through line 9-9 in FIG. 6.

The broken lines show portions of the filtration system that form no part of the claimed design. 

CLAIM The ornamental design for a filtration system, as shown and described. 